Steam-generator



(No Model.)

M. E.' BEASLEY.

, STEAM GENERATOR. No. 341,721., lPatented May 11, 1886.

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STEAM-GENERATOR rGFCc/l-VQN forming part of Letters Patent No. 341,721,dated May ll, 18815.

Application lileil January 4. 1886. Serial NJ. 157.540. (No modela Toall whom it muy concern:

Be it known that I, Manin E. Bnnstnr, a citizen ofthe United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Steam-Generators, of which the following is aspecification.

Myinvention relates to that class of steamgenerators in which the heatis derived from a chemical compound, the objects of my invention beingto so construct such a generator as to insure the thorough heating ofthe water, to properly heat the chemical compound be fore introdlicingthe same into the generator, to maintain said compound in an activestate as long as possible, and to prevent the overheating of thecompound before the admission ofthe same to theheatiiig-chamber ofthegenheat in somewhat the same manner as heat is developed on slakingcaustic lime with water; and my invention consists of a generator invtended for the use of such chemical fuel. The chemical which l. preferto use is a mixture of hydrate of soda, about one hundred parts to watertwenty parts. The particular chemical employed, however, forms no partof my present invention, the latter being limited tothe construction ofthe generator, which is shown in the drawings, A being the outer shellor casing suitably supported within, which is the casing B of aheating-chamber, D, which is intended to contain the liquid chemicalsubstance or compound from which is derived the heat necessary forgenerating steam in the vessel A, this solution or compound beingintroduced into thechamber D through a pipe, a, and being withdrawn,when spent, through a pipe7 b.

Through the chamber D extend tubes j', which serve to provide 'for thecirculation of water through said chamber, and for the effectiveapplication of the heat of its contents to the water for the purpose ofvaporizing the same. l

Generators have been devised in which the 'fuel-chamber surrounds thewater-chamber, the latter ha\f'ing tubes projecting down into thefuelchamlier and communicating with a hollow head; but in such casethere can be no circulation except that set up through the tubes, orelse a downward circulation through some of the tubes in opposition tothe natural current which would be caused bythe heat to 'which saidtubes are subjected. In my generator, however, there is a perfectcirculation ofthe water, the latter rising through the tubes which passthrough the fuel-chamber and descending adjacent to the outer casing ofthe generator, where it is comparatively free from the influences of theheated shell of the fuelchamber.

Into the chamber D extends a pipe,i i/, which communicates with theexhaust from the cngine or other apparatus, lfor the operation of whichthe steam generated in the vessel A is intended, said pipe g beingperforated or provided with a perforated head, li, so as to insure thedissemination of the steam or water of condensation in a number of smallstreams throughout the chamber D, and thus cause its intimate admixturewith the contents of said chamber.

eforc entering the chamber D the pipe g forms acoil, w, in a. vessel, F,communicating with the pipe c, this vessel serving as a means of heatingthe chemical solution or compound prior to its introduction into thechamber D within the generator. By thus heating the chemical beforeintroducing it into the chamber D, Iam enabled to maintain a practicallyuniform pressure in the generator, as 'the temperature of the water isnot lowered on each introduction of fresh chemical, whereas when thechemicalis introduced in a cold state there is a lowering of thetemperature of the water until such time as the temperature of 'thechemical is (owing to the absorption by said chemical of the waterorsteam) raised to that of the Water in the generator.

In order to prevent the imparting of too high a degree of heat to thecompound or solution in the preliminary heating vessel F, however, Iprovide said vessel with a tube, i, containing alcohol or other volatileliquid,

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` from the bulb a.

this tube having` a bulb, i', which is in communication through aflexible pipe, m, with a bulb, a, secured to or forming part of one armof alever, G, the other arm ot' which is weighted, said lever beingconnected to the stem p of a valve, J, Which is constructed, as shown inFig. 3, so that when in its elevated position it will direct the steamfrom the supply pipe s to the pipe g through the coil w in the vessel F;but when the valve is lowered it will cut oft said coil fromcommunication with the pipe s, and will direct the steam through abranch pipe, x, to the pipe g.

As soon as the heat of the chemical compound in the vessel F rises abovethe required degree the expansion of the fluid in the tube z' causes themercury or other liquid to be forced from the bulb t" into the bulb a,the

weight thus added thereto causing the lever G to tilt, and thuseffecting such an operation .of the valve J as will direct the steam tothe branch :r and cut oft' the coils w, the steam being directed to thelat-ter again when the temperature of the compound is so far reduced asto effect' a contraction of the liquid contents of the tube z' andawithdrawal ofthe mercury Check valves prevent backtlow through eitherthe coil w or branch zr.

Both the generator and the heating-chamber are preferably provided withgages, as shown, whereby the level of water in the gen'- erator or ofthe solution or compound in the heating-chamber is indicated.

The chemical solution is heated by outside .means in starting thegenerator, and in order that the vapor arising from said solution may beavailable for work in operating the motor or other apparatus beforesteam is generated,

I provide the heating-vessel B with a valvedV pipe, y, communicatingwith the dischargepipe y of the generator, the valve in said pipe ybeing closed when steam under sufficient pressure has been generated.

I claim as my ,inventionl. The combinatiomin a chemical-fuelsteamgenerator, ot' the generating-vessel, a fuel-hold er containedtherein, but accessible from the outside of the generator, andcirculating-tubes passing through saidfuel-holder, all substantially asspecified.

2. The combination,in achemical-fuel steamgenerator, of thegenerating-vessel,a fuel holder, B, contained therein, a fuel-heatercommunicating with said holder B, and a pipe for conveying theexhaust-steam first through the fuelheater, and then into the holder B,all substantially as specified.

3. The combination,in achemical-fuel steamgenerator, of thelgenerating-vessel, the fuelholder contained therein, the fuel-heatercoinmunicating with said holder, asteam-pipe passing through the fuel-heater and having a branch outside of the same, and a valve wherebysteam can be caused to pass either directly through the pipe or th'roughthe branch, all substantially as specified.

4. The combination of the generator A, the fuel-holder B, containedtherein, the supplementary fuel-heater F, containing a steam-coil, avalve controlling the admission of steam to said coil, and a thermostatin the heater for operating said valve, all substantially as specified.

5. The combination of the generator A, the fuel-holder B, containedtherein, the supplementary heater F, containing a steam-coil, the pipeg, extending into the holder B, the branch x, a valve whereby steammaybe directed to the pipe g, either through the heating-coilin theVessel F or through said branch x, and a thermostat for operatingsaidvalve, all substantially as specified. l

6. The combination of the steam-generator and its pipe y with thefuel-holder B, contained in the generator, and having a valved pipe, y,ct'nnmunicating with the pipe y', as set forth.

In testimony whereof I have signed my name Y to this specification inthepresence of two subseribing witnesses.

MARTA E. BEASLEY.

Witnesses:

WILLIAM D. CoNNnR, H ARRY SMITH.

